title: [EEG-slowing after high-dose Methotrexate with citrovorumfactor-rescue. A spectralanalytic study (author's transl)].
abstract: In 23 treatment courses of high-dose Methotrexate (MTX) with Leukovorin-rescue for osteogenic sarcoma serial EEG-examinations before and after MTX-infusion were done. In 11 course Vincristine had been administered additionally. Frequency-analysis of EEG-background activity was performed by computer-based FFT. At the end of the MTX-infusion EEGs were unchanged, compared with the findings before start of treatment. At 24 and 48 hours after start of infusion, there was a slight but statistically significant slowing, recognizable from an increase of the theta/alpha-ratio (median + 48%, range -7% to + 373%) and a drop of dominant frequency (median-8%, range +12% to -53%). There was a stronger trend towards normalisation in patients, not having received Vincristine. The greatest changes were found in a patient, whose serum-MTX-concentration at 24 hours exceeded the upper therapeutic limit. The EEG-findings are discussed as an equivalent of a subclinical MTX-encephalopathy. Acute encephalopathies with severe EEG-changes and morphological changes on CT have been observed in MTX-intoxications.
mesh_terms: D000293:Adolescent; D000328:Adult; D002540:Cerebral Cortex / Q000187:drug effects; D002648:Child; D004569:Electroencephalography / Q000379:methods*; D005071:Evoked Potentials; D005260:Female; D006801:Humans; D002955:Leucovorin / Q000009:adverse effects* / Q000627:therapeutic use; D008297:Male; D008727:Methotrexate / Q000009:adverse effects* / Q000627:therapeutic use; D012516:Osteosarcoma / Q000188:drug therapy*
chemical_list: D002955:Leucovorin; D008727:Methotrexate
vernacular_title: EEG-Verlangsamung nach hochdosiertem Methotrexat mit Citrovorumfaktor-Schutz. Eine spektralanalytische Untersuchung.